Galvanic dry element



UNITED STATES PATENT OFFICE.

TO WEBER & 00., OF PHILADELPHIA, PENNSYLVANIA.

GALVAN IC DRY ELEM ENT.

SPECIFIGATION forming part of Letters Patent No. 417,458, :lasei December 1'7, 1889. Application filed September 7, 1389. Serial No. 323,250. (No specimens.) Patented in Germany September 11, 1888, No. 47,164.

To all whom it may concern.-

Be it known that I, CARL HEINRICH WOLFE,

. cipitated hydrate of alumina, plaster-of-paris or gypsum,and generating-salts and combine the same, the action of the hydrate of alumina serving to loosen the otherwise heavy and compact matters of the plaster-of-paris and reduce the inner resistance of the element.

CARL HEINRICH WVOLFF, OF BLANKENESE, PRUSSIA, GERMANY, ASSIGNOR Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is

1. A generator for a galvanic dry element having hydrate of alumina therein, substantially as and for the purpose set forth.

2. A composition consisting of plaster-ofparis, a generating-salt, and hydrate of alumina, substantially as and for the purpose set forth.

CARL HEINRIGI-I WOLFE.

\Vitnesses:

0. ZANENTZKY, CHAS. H. BURKE. 

